Abstract: A dragline bucket includes a base member defining a first end, a second end, and a third end. The dragline bucket also includes a first side wall, a second side wall, and an end wall extending from the base member proximate to the third end of the base member such that the end wall is connected to each of the first side wall and the second side wall. The end wall includes a first portion connected to the base member such that a first angle is defined between the base member and the first portion. The end wall also includes a second portion extending from the first portion. The second portion is substantially perpendicular to the base member. The end wall further includes a third portion extending from the second portion such that a second angle is defined between the second portion and the first portion.

Abstract: To provide a small hydraulic excavator, which even may have an upperstructure formed such that at least its rear end swings within a body width range and having a limited installation space for devices, that allows an accumulator to be disposed and allows the accumulator to be protected from external force generated during work. The present invention relates to a rear small-swing type mini excavator that includes an accumulator 30 accommodating and recovering potential energy and hydraulic energy used by at least one of drives of an undercarriage 1, an upperstructure 2 formed such that its rear end swings within the body width range of the undercarriage 1, and a working device 3.

Abstract: A work machine, in particular a cable-operated excavator, for dragline bucket operation, a dragline bucket taken up by a hoist rope, wherein the attachment can be retracted by at least one dragline for carrying out the dragging movement and a dragline guide for guiding the dragline is arranged at the work machine, wherein the dragline guide is designed as movable, in particular as linearly movable.

Abstract: A method and apparatus for installing and removing shrouds from the lips of an earth moving bucket. The lips have forwardly converging upper and lower surfaces which are engaged by correspondingly rearwardly diverging legs of the shrouds that overly and are in contact with the lip surfaces. A hole is provided in the lip and an oblong hole in one of the legs that is aligned with the hole and has axially extending, spaced-apart flat walls which define engagement ledges that face and overlap the bore. A connector for securing the shroud to the lip is placed in the bore and the hole and has shaped exterior surfaces for positioning between the walls so that the connector is axially movable along the walls and past the engagement ledges while relative rotations between the connector and the hole in the leg are prevented.

Abstract: A mining shovel includes a base for supporting the shovel on a support surface, a boom, an elongated member movably coupled to the boom, and a support member. The boom includes a first end pivotably coupled to the base and a second end positioned away from the base, the boom being pivotable about a boom pivot axis extending transversely to the boom proximate the first end. The elongated member is pivotable about a shaft positioned between the first end and the second end of the boom. The support member biases the boom against pivoting movement about the boom pivot axis, and the support member extends between the base and the boom.

Abstract: A hydraulic excavator is provided with a lower traveling unit, an upper structure, an engine, a hydraulic pump, an engine compartment, a pump compartment and a plurality of filter devices. The upper structure is rotatably disposed on the lower traveling unit. The pump compartment provided on the upper structure for housing the hydraulic pump. The pump compartment has a door that allows access to an interior of the pump compartment. The filter devices, which are disposed adjacent to each other, are disposed at positions that are mutually offset in a height direction of the hydraulic excavator.

Abstract: A sheave includes a hub defining an axis, a rim defining at least one circumferentially extending groove, and two plates oriented substantially perpendicular to the axis. Each plate is connected to the hub and to the rim, and a plurality of reinforcing tubular members extend between the plates.

Abstract: A mining shovel includes a digging assembly having a generally V-shaped boom including a lower connection point for attachment to the mining shovel. A first portion of the boom extends generally upwardly from the lower connection point, and a second portion of the boom is angled with respect to and extends upwardly and forwardly from the first portion. The second portion includes a distal end defining a sheave support, and a pivot element is positioned generally at a connection area between the first portion and the second portion. The digging assembly also includes a boom attachment having a first end that is pivotally supported by the pivot element and a second end that is supported by the sheave support.

Abstract: A dragline bucket includes a main body moveable between a digging orientation and a dumping orientation and a pivotable spreader beam coupled to the main body at a pivot point. The dragline bucket further includes an energy capture mechanism including an actuator coupled to the main body and the pivotable spreader beam and an energy storage mechanism coupled to the actuator.

Abstract: A mining shovel includes a boom and a transmission unit coupled to the boom. The transmission unit includes an outer housing, an internal motor housing disposed within the outer housing, and a venting system coupled to the outer housing to direct air through both the outer housing and the internal motor housing.

Abstract: A machine includes a base, a main housing that is freely rotatable and supported on the base. The main housing includes a generally horizontal surface. The machine also includes a drum mounted on said main housing, a boom extending from said main housing, a bucket operatively connected to and supported by the boom, a wire rope extending between the drum and the bucket for movement of the bucket, a fairlead disposed on the main housing along a path of the wire rope. The wire rope passes through the fairlead between the drum and the bucket. A dynamic dampening mechanism is disposed on the fairlead, the dynamic dampening mechanism including a dampening fluid having a variable viscosity in response to an electrical current applied thereto.

Abstract: Equipment for mining and excavating includes a bucket used to remove overburden, a boom for positioning the bucket, and a hoist and drag cable for controlling the bucket. The equipment also includes a drum; a pedestal, a pinion assembly, and a cartridge assembly. The drum is used to wind the hoist cable or the drag cable. The pedestal supports the drum and surrounds a bull gear attached to the drum. A pinion of the pinion assembly extends within a port in the pedestal to engage the bull gear. The cartridge assembly is attached to the pedestal and includes an electric motor having a shaft extending from the motor, and a gear reduction coupled to the motor shaft. The pinion assembly is driven by the motor via the gear reduction. The pedestal allows the pinion assembly and other components to be removed or installed, without entirely separating the cartridge assembly from the pedestal.

Abstract: Equipment for mining and excavating includes a bucket used to remove overburden, a boom for positioning the bucket, and a hoist and drag cable for controlling the bucket. The equipment also includes a drum; a pedestal, a pinion assembly, and a cartridge assembly. The drum is used to wind the hoist cable or the drag cable. The pedestal supports the drum and surrounds a bull gear attached to the drum. A pinion of the pinion assembly extends within a port in the pedestal to engage the bull gear. The cartridge assembly is attached to the pedestal and includes an electric motor having a shaft extending from the motor, and a gear reduction coupled to the motor shaft. The pinion assembly is driven by the motor via the gear reduction. The pedestal allows the pinion assembly and other components to be removed or installed, without entirely separating the cartridge assembly from the pedestal.

Abstract: In one embodiment of the invention, a hoe equipped excavator includes a base, a boom pivotally mounted at one end on the base, a stick pivotally coupled at one end to the other end of the boom, a tool pivotally coupled to the other end of the stick, a boom link plate pivotally coupled to the boom, a lift cylinder coupled between the base and the boom link plate and an adjustment cylinder coupled between the boom link plate and the boom. The lift cylinder is operable to pivot the boom through a first circumferential range, and the adjustment cylinder is operable to pivot the boom beyond the first circumferential range.

Abstract: A crawler frame includes a center frame and right and left track frames disposed at right and left sides of the center frame so as to extend in a back and forth direction, wherein legs for connecting a central frame section of the center frame to the track frames are formed from cast steel in order that washing can be easily done by reducing the amount of mud to be adhered to and deposited on the legs and in order that easy manufacture may be possible.

Abstract: In a crawler frame in which legs in a center frame are formed from cast steel, a simple structure is achieved by reducing the number of components. To this end, the crawler frame, which has a center frame composed of a central frame section for supporting a swing bearing and legs located on the right and left sides of the central frame section; and track frames disposed on the sides of the distal ends of the legs, respectively, of the center frame, is designed such that each of the legs is bifurcated into front and rear leg sections and the front and rear leg sections are respectively formed from cast steel.

Abstract: A large electric dragline having a housing (35) and boom (37) is provided with spaced apart in-line sheaves (34) and (36) at boom point to separate hoist ropes (31) and (32) which are led to the front and rear of bucket (30) respectively. Differential hoist rope control allows accurate and continuous adjustment of the bucket carry angle during all modes of operation. Also described is a computer control system giving continuous accurate control of carry angle by differential hoist rope operation, with manual selection of mode of operation.

Abstract: In the operation of work machines of the type having an extensible arm, the maximum reach of the arm for a given work machine is limited by such factors as the vehicle's weight, body size and engine placement. The present invention provides for a work machine arrangement in which a work machine has an engine cooling apparatus mounted to the work machine body such that the engine cooling apparatus's longitudinal axis is oriented substantially parallel to the arm longitudinal axis.

Abstract: A new and improved appliance boom having opposite ends. One of the ends is adapted to be secured to the bucket of an articulated powered bucket loader. The other end is adapted to be secured to an appliance. The boom has means for guiding appliance control cables from end to end. At least one control cable having opposite ends is trained through the means. One of the control cable ends is attached to the appliance; the other of the control cable ends is attached to a control in the cab of the bucket loader to which the boom is attached. The appliance cradle may be secured to appliances ranging from crane pulleys, chain saws, and rotary drills, reciprocating saws, to other rotary or reciprocating equipment. The appliance boom may be secured to the bucket of a conventional bucket loader and unattached conveniently and stored when not in use.

Abstract: A dragline excavation bucket control system comprising a pair of hoist ropes and a drag rope, the hoist ropes being coupled adjacent opposite ends of the bucket. The hoist ropes are supported on spaced sheaves on an excavation boom whereby the hoist ropes extending between the boom and bucket are substantially parallel and the boom support points and bucket attachment points for the hoist ropes are controllable to maintain an optimal carry attitude for a bucket when in use.

Abstract: A power mining shovel including a drive train drivingly connected to ground-engaging device, the drive train including a drive train shaft, and a disc brake apparatus operably connected to the drive train shaft for selectively preventing rotation of the drive train shaft, the disc brake apparatus including a brake hub mounted on the drive train shaft for rotation therewith, the brake hub including an outer member rotatable about the axis, the outer member including an inner wall defining a generally cylindrical bore centered on the axis, the inner wall having therein a plurality of recesses, the brake hub also including an inner member rotatable about the axis, the inner member including internal splines engaging the drive train shaft to prevent relative rotation of the inner member and the drive train shaft, the inner member being located in the bore of the outer member and having a generally cylindrical outer wall, the outer wall having therein a like plurality of recesses, each of the recesses in the outer

Abstract: The present invention discloses a method and apparatus for excavating material from a mining or reclamation operation, and is generally considered useful in open cast mining operations. The apparatus has a first conveyor and a second conveyor attached to a chassis. The first conveyor is fitted with a material remover such as a excavator bucket on a first end. Material discharges from the first conveyor onto a second conveyor which is generally longitudinally aligned with the first conveyor and has a material receiving point located elevationally below the discharge point of the first conveyor. The first conveyor is moved in a forward direction by a crowder which consists of motion generally along the coincident longitudinal axes of the two conveyors. The first end of the first conveyor which is fitted with the excavating bucket is elevationally moved by virtue of a boom and cable configuration.

Abstract: A material delivery system conveys material from a supply location at or above an area surface to a working location below the area surface. The delivery system includes a supply hopper located at the supply location and having an inlet for receiving material to be conveyed and an outlet for discharging material. An injection hopper is adapted for mounting on a movable working arm of a self-propelled vehicle, and has an inlet for receiving material and an outlet for discharging material. The arm of the vehicle carries the injection hopper below the area surface to the working location. A supply line is connected to the outlet of the supply hopper and to the inlet of the injection hopper for conveying material from the supply location to the working location.

Abstract: A dragline comprising a main housing, a moving mechanism for moving the main housing over the ground, and a planetary transmission driving the moving mechanism, the planetary transmission including a transmission housing, a sun gear, a ring gear and planet gears centered on a center axis, the planet gears meshing with the ring gear and the sun gear so that the planet gears rotate about the center axis, the planet gears drivingly connected to a carrier, the carrier including a low-friction coating on a carrier annular surface and a carrier cylindrical surface, the low-friction coating reducing friction between the carrier and the transmission housing.

Abstract: An integral dump block for use in a dragline bucket that comprises a sheave to movably support a dump line, a central pin rotatably supporting the sheave, and a housing to couple the pin to lift lines. Bearings are disposed within the sheave and each side of the housing for receiving the pin for free rotation. Hoist lines for supporting a dragline bucket are connected to each end of the pin. In this way, moment forces in the hoisting assembly can be substantially eliminated. Further, a number of parts can be eliminated to provide a reduction in weight and height of the hoisting linkage assembly.

Abstract: Heavy machinery comprising a lower support structure having an upper surface, and an upper structure having a generally horizontal lower surface facing the upper surface of the lower structure, the upper structure being supported above the lower structure for rotation relative to the lower structure about a generally vertical axis, and the lower surface of the upper structure having therein an upwardly extending recess surrounding the axis to provide space for a person working on the machinery, the recess being defined at least in part by an upper wall above and generally parallel to the lower surface, and by a plurality of generally planar facets surrounding the axis, each of the facets extending transversely to the upper wall and to the lower surface.

Abstract: A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a moving mechanism for moving the main housing over the ground, a boom having upper and lower ends and a rectangular cross-section, the lower end being connected to the main housing, the upper end having thereon a sheave, the boom having a longitudinal axis and including a center section having top and bottom members parallel to the longitudinal axis, the center section having a neutral axis above the longitudinal axis, structure supporting the boom relative to the main housing, a bucket, a hoist rope extending between the bucket and the bucket hoist mechanism and over the sheave for causing vertical movement of the bucket, and a drag rope extending between the bucket and the bucket drag mechanism for causing horizontal movement of the bucket.

Abstract: In an operator system for providing services to subscribers in a public telephone network, a circuit board for controlling audio characteristics of audio signals in the public telephone network. The circuit board comprises an interface for receiving the audio signal from the public telephone network, an audio characteristics control circuit coupled to the interface for receiving the audio signal, adjusting the audio characteristics of the audio signal and for recording and generating voice messages to be transmitted to the public telephone network via the interface and a headset interface coupled to the audio characteristics control circuit for receiving the adjusted audio signal and providing an interface to at least two headsets.

Abstract: An excavation controlling apparatus which can effect precise driving control off a dipper in accordance with an actual operation condition with a simple structure of a low cost. A dipper handle extension instruction calculation section calculates a dipper handle extension instruction signal from a difference between a moment upper limit value set by a moment limit value setting section and a working moment calculated by a working moment calculation section, and causes a dipper handle driving motor output controlling apparatus to control a sliding driving operation of a dipper handle in accordance with the dipper handle extension instruction signal. A hoisting operation instruction calculation section corrects a hoisting operation reference instruction set by a hoisting operation reference instruction setting section with the moment upper limit value and a hoisting operation instruction correction amount calculated from the working moment.

Abstract: The new method relates to a machinery assembly having (a) a housing, (b) an eccentric confined in the housing, (c) a shaft extending into the eccentric and (d) a shaft axis of rotation. A method for moving the shaft with respect to the housing includes the steps of applying a support force at a point on the housing so that such force places the housing substantially in equilibrium with respect to the axis. A withdrawing force is then applied to the shaft in a direction generally parallel to the axis. A jacking mechanism contacts the housing at a point to apply a support force to such housing. The force magnitude and direction place the housing substantially in equilibrium with respect to the axis to reduce or eliminate frictional forces.

Abstract: The present dump block (100) comprises an internal plate (106) attached to an external plate (108) with a rotatably mounted sheave (110) therebetween. The external plate (108) presents a smooth convex surface. Bearings (126) are mounted between the sheave (110) and a centrally located shaft (122). The position of the bearings (126) is maintained by a bearing side plate (116) A side plate bearing cushion (124) is located between the bearing side plate (116) and the bearings (126). The bearing cushion (124) absorbs the force of any impacts experienced by the dump block (100). Likewise, the convex surface of the external plate (108) turns any impact into a glancing blow, thereby extending the life of the dump block (100).

Abstract: The invention involves a machine, e.g., a walking dragline having a drive gear, a driven member which loads (and wears) gear teeth unequally and an interconnecting shaft. The quill-mounted gear is separately supported by bearings. The shaft can be moved axially and when so repositioned, it is also separately supported by other bearings. When the gear needs to be "indexed," (due to unequal tooth wear) the shaft is moved axially out of connection with the gear but remains connected to the eccentric. The gear can then be indexed using its drive motor and the shaft can be re-engaged with the quill without the necessity of auxiliary lifting equipment and without disengaging the shaft from the eccentric.